Smoke-reducer



w. F STARK. SMOKE REDUCER. APPLICATION FILED FEB. 13, I918- PatentedMar. 2,1920.

. m .n W 3 WILLIAM F. STARK, or cH-Ic'Aoo, InLINoIs.

sMoxE-ItnnucEn.

Specification of Letters Patent.

Patented Mar. 2, 1920.

Application filed February 13', 1918. Serial No. 216,999.

' To all whom it may concern:

Be it known that I, YVILLIAu F. STARK, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented new and useful- Improvements in Smoke-Reducers', of which thefollowing is a specification.

This inventionrelates to smoke reducers, the object in view being toprovide a simple and effective device applicable to any furnace orstove, especially small steam plants and hot water heaters and furnaces,whereby better combustion is obtained and the carbon and gases from thesmoke consumed, thereby eliminating the black smoke now found soobjectionable particularly in large cities.

A further object of the invention is to provide a smoke reducer whichmay be cheaply manufactured, which may be sold at a reasonable figure,and which may be readily applied to a furnace fuel door opening, thedevice not interfering with the opening and closing of the fuel door,nor with the feeding of the fuel to the furnace.

A further object of the invention is to construct the device in suchmanner that access may be easily and quickly had to the mixing andheating chamber thereof.

With the above and other objects in view the invention consists in thenovel construction, combination and arrangement of parts, as hereinillustrated, described and claimed.

In the accompanying drawing,

Figure 1 is a sectional view of the furnace, showing the improved devicein its applied relation thereto.

Fig. 2 is a horizontal section through the device detached on the line22 of Fig. 1.

The device, as a whole, is in the form of a hood designated generally atA, the same comprising an inner wall 1 and an outer wall 2 arranged inspaced relation to each other to provide an intervening mixing andheating chamber 3 preferably of arcuate or quadrantal formation.

Ordinarily, in the preferred embodiment of this invention, the innerwall 1 will be formed of metal, such as cast or wrought iron, and willbe provided adjacent to the bottom substantially semi-circular edgethereof, with an offset forming a supporting ledge 4, the outer wall 2being formed with a correspondingly shaped rabbet 5 thereby .providing acurved and substantially semicircular lip 6 which rests upon the ledge4:.

Adjacent to its upper and forward edge, the outer wall 2 is formed inthe inner face thereof with a groove 7 to receive a rib 8 extending overand around the receiving portion of the hood. In this way, the outerwall 2 which is preferably formed of fire clay, is supported andsustained at two points or along two lines upon and in relation to theinner wall 1. An arcuate air inlet orifice 9 leads to the heating andmixing chamber 8, and the outer wall 2 is 3rovided adjacent to thebottom edge thereof with a number of outlet openings 10 through whichthe heated air and gasare discharged and, afterward, ignited, combiningwith the gases arising from the fuel, just beyond the hood, the resultbeing that the gases which would ordinarily escape to the smoke pipe orflue are ignited and burned. 11 designates a curved offset which forms aconnecting wall between the inner wall 1 of the mixing and heatingchamber and an apron-like extension 12 which may be fastened to the fueldoor frame in any suitable manner as by means of attaching plates 13.

As indicated in Fig. 1, the apron-like extension 12 of the device issecured to and within the frame 14 of the fuel door opening of thefurnace. The hood extends well into the fire box above the grate,preferably a distance equal to or greater than twothirds the depth ofthe fire box from front to rear. The fuel is fed to the furnace in theusual way through the furnace door opening and is gradually coked underthe hood and is then fed forwardly to a point beyond the hood, the gasesrising under the hood, passing through the mixing chamber 3 and beingignited after passing through the openings 2.

I claim:

1. The combination with a fire box having a door opening in one wall, ofa hood arranged within the fire box and including spaced walls defininga mixing and heating chamber, means for securing said hood to the wallsof the door opening, said hood being concaved, directed downwardly andterminating below the walls of the opening, and said chamber having aninlet leading from inside the hood adjacent one end, and an outletopening adjacent the opposite end.

2. The combination with a firebox having an opening in one wall thereof,of an apron secured to the wall of said opening and projecting into thefire box, a hood supported by said apron and including spaced Wallsdefining a mixing and heating chamber said hood being concaved anddirected downwardly, and said chamber having an inlet opening leadingfrom the inside of the hood, and an outlet opening adjacent itslowermost end.

3. The combination with a firebox having a door opening, of an apronsecured to the walls of said opening and projecting into the firebox, ahood supported by said apron and including spaced Walls defining amixing and heating chamber, said hood being concaved and directeddownwardly to terminate below the edges of said apron and opening in thefirebox, and said chamber having an inlet opening leading from'insidethe hood at its point of connection with the apron, and an outletopening adjacent the opposite end thereof.

4. The combination with a firebox having a door opening, of a hoodarranged within the-firebox, said hood being concaved and directeddownwardly and including spaced walls defining a mixing and heatingchamber, means for supporting the hood upon the walls of the dooropening, one Wall of the hood being formed to provide supporting ledges,shoulders formed on the remaining wall and engaged against said ledges,and said mixing and heating chamber having an inlet'opening leading frominside the hood, and an outlet opening adjacent the lower end thereof.

5. The combination with a firebox having a door opening, of a hoodarranged within the firebox and including spaced Walls defining a mixingand heating chamber, an apron for supporting the hood from the walls ofthe opening, said hood being concaved and directed downwardly, one ofsaid walls being constructedof metal and formed to provide a supportingledge, the remaining wall being composed of fire clay and including alip resting on said ledge, and said mixing and heating chamber having anair inlet opening leading from inside the hood, and an outlet openingadjacent its lowermost end.

In testimony whereof I afiix my signature.

.WILLIAM F. STARK.

